Antenna



FIG. 1 is a perspective view of an antenna having a tapered, cylindrical cone element with open ends and parabolic shield;

FIG. 2 is a front view of an antenna having a tapered, cylindrical cone element with open ends and parabolic shield;

FIG. 3 is a side cut-away view of an antenna having a tapered, cylindrical cone element with open ends and parabolic shield;

FIG. 4 is a side view of an antenna having a tapered, cylindrical cone element with open ends and parabolic shield; and,

FIG. 5 is a side view of an antenna having a tapered, cylindrical cone element with open ends and planar shield.

The broken line showing of the shield is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an antenna, as shown and described. 